Guru
Joined: 11/02/2018
Location: AustraliaPosts: 3191
| Posted: 01:28pm 29 May 2025 |
Depending on the mA-Hour capacity of the cells you may not need to add any series resistance. A continuous charge current up to 1/20 of the mA-Hour capacity is usually ok. Your solar panel effectively has a series resistance of 50Ω anyway.
A simpler option than the ideal diode circuit may be just a bigger diode.
Schottkey diodes don't have the sharp fixed voltage turn-on that rectifier diodes have so a 10A schottkey might drop about 100mV at such a low current.